/*图片自适应单双栏 (如不需要则注释下面两段, 并开启 display:none 那行)*/
@media screen and (max-width:720px) {
div.main-img {width: 100%;overflow:hidden;}
div.main-img div.left{position:relative;width: 200%;z-index:2;}
div.main-img div.right{position:relative;width: 200%;margin-left:-100%;z-index:1;}
}   /*【额外pic设置】div.main-img div.pic{clip-path: polygon(0 0, 100% 0, 100% 94%, 0 95%);margin-top: 0.5em;}*/  /* margin-bottom: -4.5em; */
@media screen and (min-width:721px) {
div.main-img{width:100%;overflow:hidden;margin-top: 0.5em;}
div.main-img div.left{position:relative;display:hidden;margin:0;padding:0;}
div.main-img div.right{position:relative;width:100%; display: none;} 
}   /* 【right部分】高度H÷宽度W   margin-top: -147.3235%; */
/*div.main-img div.right {display:none;}*/
